fixes mypy

Author: pcrespov

packages/settings-library/src/settings_library/base.py

@@ -58,7 +58,7 @@ def _is_auto_default_from_env_enabled(field: FieldInfo) -> bool:
     )
 
 
-ENABLED: Final = {}
+_MARKED_AS_UNSET: Final[dict] = {}
 
 
 class EnvSettingsWithAutoDefaultSource(EnvSettingsSource):
@@ -89,7 +89,7 @@ def prepare_field_value(
             _is_auto_default_from_env_enabled(field)
             and field.default_factory
             and field.default is None
-            and prepared_value == ENABLED
+            and prepared_value == _MARKED_AS_UNSET
         ):
             prepared_value = field.default_factory()
         return prepared_value

packages/settings-library/src/settings_library/basic_types.py

@@ -1,11 +1,12 @@
+from enum import Enum
 from typing import Annotated, TypeAlias
 
 from common_library.basic_types import BootModeEnum, BuildTargetEnum, LogLevel
 from pydantic import Field, StringConstraints
 
-assert LogLevel  # nosec
-assert BootModeEnum  # nosec
-assert BuildTargetEnum  # nosec
+assert issubclass(LogLevel, Enum)  # nosec
+assert issubclass(BootModeEnum, Enum)  # nosec
+assert issubclass(BuildTargetEnum, Enum)  # nosec
 
 __all__: tuple[str, ...] = (
     "LogLevel",